from flask import g
from flask import request
from flask import session, jsonify

from info import redis_store
from info.models import User, News, Category
from info.utils.captcha.captcha import captcha
from info.utils.common import user_login_data
from info.utils.response_code import RET
from . import index_blu
from flask import render_template, current_app

#功能描述: 获取首页新闻内容
# 请求路径: /newslist
# 请求方式: GET
# 请求参数: cid,page,per_page
# 返回值: data数据
@index_blu.route('/newslist')
@user_login_data
def newslist():
    """
    1. 获取参数
    2. 参数类型转换
    3. 分页查询
    4. 获取分页对象属性,总页数,当前页,当前页对象
    5. 将当前页对象列表,转成字典列表
    6. 响应,返回json数据
    :return:
    """

    # 1.获取参数
    cid = request.args.get("cid", "1") # 如果获取不到，使用后面的默认值
    page = request.args.get("page", "1")
    per_page = request.args.get("per_page", "10")

    # 2.参数类型转换，为了paginate准备
    try:
        page = int(page)
        per_page = int(per_page)
    except Exception as e:
        page = 1
        per_page = 10

    # 3.分页查询
    try:
        # 判断分类编号是否，不等于1，最新分类是按照时间倒序排列的
        filters = [News.status == 0]
        # filters = []
        if cid != "1":
            filters.append(News.category_id == cid)

        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page,per_page,False)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR , errmsg = "分页获取失败")

    # 4.获取分页对象属性，总页数，当前页，当前页对象
    totalPage = paginate.pages
    currentPage = paginate.page
    items = paginate.items

    # 5.将当前页对象列表，转成字典列表
    newsList = []
    for item in items:
        newsList.append(item.to_dict())

    # 6.响应，返回json数据
    return jsonify(errno = RET.OK , errmsg = "获取成功",totalPage = totalPage,currentPage=currentPage,newsList=newsList)

@index_blu.route('/')
@user_login_data
def show_index():

    # # 获取用户的编号，从session
    # user_id = session.get('user_id')
    #
    # # 判断用户是否存在
    # user = None
    # if user_id:
    #     try:
    #         user = User.query.get(user_id)
    #     except Exception as e:
    #         current_app.logger.error(e)

    # 查询数据库，根据点击量查询前十条新闻
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(10).all()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR , errmsg = "查询新闻异常")

    # 将新闻对象列表， 转成字典列表
    click_news_list = []
    for news in news_list:
        click_news_list.append(news.to_dict())

    # 查询所有的分类信息
    try:
        categories = Category.query.all()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR , errmsg = "分类查询失败")

    # 将分类的对象列表，转成字典列表
    category_list = []
    for category in categories:
        category_list.append(category.to_dict())

    # 将用户的信息转成字典
    dict_data = {
        # 如果user存在，返回左边， 否则返回右边
        "user_info":g.user.to_dict() if g.user else "",
        "click_news_list" : click_news_list,
        "categories" : category_list
    }

    return render_template('news/index.html',data=dict_data)
    # return "hello_world"

@index_blu.route('/favicon.ico')
def web_logo():
    return current_app.send_static_file("news/favicon.ico")
